Re: [PATCH] Ftrace: irqsoff tracer may cause stack overflow

[Mike Frysinger <vapier.adi@gmail.com>]

On Thu, Jan 7, 2010 at 23:45, Li Yi wrote:
> "irqsoff" tracer may cause stack overflow on architectures using
> asm-generic/atomic.h, due to recursive invoking of, e.g.
> trace_hardirqs_off().
>
> trace_hardirqs_off() -> start_critical_timing() -> atomic_inc() ->
> atomic_add_return() -> local_irq_save() -> trace_hardirqs_off()
>
> Signed-off-by: Yi Li <yi.li@analog.com>
> ---
>  include/asm-generic/atomic.h |   12 ++++++------

Arnd is watching over asm-generic/ atm

> @@ -60,11 +60,11 @@ static inline int atomic_add_return(int i, atomic_t
> *v)
> @@ -82,11 +82,11 @@ static inline int atomic_sub_return(int i, atomic_t
> *v)
> @@ -139,9 +139,9 @@ static inline void atomic_clear_mask(unsigned long
> mask, unsigned long *addr)

looks like your mailer has line wrapping problems ... might want to
fix that.  maybe just find a smtp server in ADI shanghai's office to
send to and use sendemail.smtpersver in your ~/.gitconfig ?
-mike